Lifting device for a storage box



FIG. 1 is a front perspective view of a lifting device for a storage box showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a bottom perspective view thereof; and

FIG. 4 is a top perspective view thereof, showing the lifting device in lowered condition. 

The ornamental design for a lifting device for a storage box, as shown and described. 